105 lines
3.9 KiB
Java
105 lines
3.9 KiB
Java
/*
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* Copyright Amazon.com Inc. or its affiliates. All Rights Reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*
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*/
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package compiler.c2.aarch64;
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import java.util.ArrayList;
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import java.util.Iterator;
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import jdk.test.lib.process.OutputAnalyzer;
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import jdk.test.lib.process.ProcessTools;
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/**
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* @test TestTrampoline
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* @summary Checks that trampolines to runtime code are not generated if they are not needed.
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* @bug 8285487
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* @library /test/lib
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*
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* @requires vm.flagless & os.arch=="aarch64" &
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* vm.debug == false & vm.compiler2.enabled
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*
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* @run driver compiler.c2.aarch64.TestTrampoline
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*/
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public class TestTrampoline {
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private final static int ITERATIONS_TO_HEAT_LOOP = 20_000;
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public static void main(String[] args) throws Exception {
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String testClassName = TestTrampoline.Test.class.getName();
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ArrayList<String> command = new ArrayList<String>();
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command.add("-XX:+UnlockDiagnosticVMOptions");
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command.add("-Xbatch");
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command.add("-XX:CompileCommand=print," + testClassName + "::" + "test");
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// ReservedCodeCacheSize=130M causes generation of trampolines.
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// As the non-nmethod segment is put between other two segments,
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// runtime calls will be within 128M range.
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// So there is no need for trampolines for runtime calls.
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command.add("-XX:ReservedCodeCacheSize=130M");
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command.add("-XX:+SegmentedCodeCache");
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command.add(testClassName);
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ProcessBuilder pb = ProcessTools.createLimitedTestJavaProcessBuilder(command);
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OutputAnalyzer analyzer = new OutputAnalyzer(pb.start());
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analyzer.shouldHaveExitValue(0);
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System.out.println(analyzer.getOutput());
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checkOutput(analyzer);
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}
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private static String skipTo(Iterator<String> iter, String substring) {
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while (iter.hasNext()) {
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String nextLine = iter.next();
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if (nextLine.contains(substring)) {
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return nextLine;
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}
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}
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return null;
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}
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private static void checkOutput(OutputAnalyzer output) {
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Iterator<String> iter = output.asLines().listIterator();
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String match = skipTo(iter, "Compiled method (c2)");
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if (match == null || !match.contains("Test::test")) {
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throw new RuntimeException("Missing compiler output for the method 'test'");
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}
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match = skipTo(iter, "[Stub Code]");
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if (match != null && skipTo(iter, "{trampoline_stub}") != null) {
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throw new RuntimeException("Found unexpected {trampoline_stub}");
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}
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}
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static class Test {
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private static void test(String s, int i) {
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if (s.charAt(i) > 128)
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throw new RuntimeException();
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}
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public static void main(String[] args) {
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String s = "Returns the char value at the specified index.";
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for (int i = 0; i < ITERATIONS_TO_HEAT_LOOP; ++i) {
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test(s, i % s.length());
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}
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}
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}
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}
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